This module of the 2600 series adds four channels of strain gauge and/or RTD measurements . It reads the millivolt outputs of four strain/pressure gauges with 24-bit accuracy. Two voltage sense lines for the bridge input provide a true 6-wire measurement for the highest accuracy. The 2612’s microcontroller provides I/O services to the remote 2601 client via a category-5 cable.  The cable supplies isolated serial communication and power to the 2612’s microcontroller.

Analog Inputs
All measurements are made differentially to reduce common mode noise. All field wiring is connected directly to the 2612 via removable terminal blocks as shown in the photo.  This minimizes downtime should it become necessary to replace a module. It also eliminates the need for separate terminal block assemblies.

RTD Temperature Inputs
RTD temperature sensors with alphas of 385 or 392 may be connected in a bridge circuit in place of a strain gauge. External resistors may be added to the 2612’s terminal block to complete the bridge.

Auto standardize
The 2612 has automatic standardization circuitry that periodically measures on-boards reference standards to update the gain and offset of each channel. Subsequent readings use the newest computed gain, offset and bridge input voltage. Factory calibration constants are stored in non volatile memory so that 2612’s can be replaced without requiring field calibration.

Filtering
A digital filter provides 80dB rejection or greater in the range from 49Hz to 61Hz.

I/O Modules
A wide range of I/O module types are available.  Each I/O module type has a specialized function such as analog I/O, thermocouples,  relays, digital I/O, etc.  A low-cost category-5 patch cable connects each I/O module to its Communication Module. Any combination of I/O modules may be connected to a Communication Module.

All I/O modules have on-board DC/DC converters to power module circuitry. This feature helps to prevent ground loops and associated common mode voltage problems when the I/O modules are distributed over long distances.  In addition, the inter-module communication circuits are optically isolated so as to eliminate communication ground loops.

Model 2601	Communication module
Model 2608-0	16 analog and TC inputs (16 bit)
Model 2608-4	16 analog and TC inputs (16 bit), 4 analog outputs (16 bit)
Model 2608-8	16 analog and TC inputs (16 bit), 8 analog outputs (16 bit)
Model 2610	48 digital I/O, 5VDC to 24VDCModel 2612
Model 2612	Strain Gauge via Ethernet
Model 2620	4 encoder/counter/frequency interfaces (32 bit)
Model 2650	8 relay outputs, 0V to 240V @ 10A
Model 2652	SSR I/O Module (Supports 8 SSRs)
Model 2653	SSR I/O Module (Supports 16 SSRs)
Model 204	Power supply, 24 VDC @ 5A

 
Design Assistant
Use our design assistant to help you configure a system unique to your specifications and calculate pricing.